<template>
    <div>
        <img v-bind:src="options.img" @click="editCropper()" title="点击上传头像" class="img-circle img-lg" />
        <el-dialog :close-on-click-modal="false" :title="title" :visible.sync="open" width="800px" append-to-body>
            <el-row>
                <el-col :xs="24" :md="12" :style="{height: '350px'}">
                    <vue-cropper ref="cropper" :img="options.img" :info="true" :autoCrop="options.autoCrop"
                        :autoCropWidth="options.autoCropWidth" :autoCropHeight="options.autoCropHeight"
                        :fixedBox="options.fixedBox" @realTime="realTime" />
                </el-col>
                <el-col :xs="24" :md="12" :style="{height: '350px'}">
                    <div class="avatar-upload-preview">
                        <img :src="previews.url" :style="previews.img" />
                    </div>
                </el-col>
            </el-row>
            <br />
            <el-row>
                <el-col :lg="2" :md="2">
                    <el-upload action="#" :http-request="requestUpload" :show-file-list="false"
                        :before-upload="beforeUpload">
                        <el-button size="small">
                            上传
                            <i class="el-icon-upload el-icon--right"></i>
                        </el-button>
                    </el-upload>
                </el-col>
                <el-col :lg="{span: 1, offset: 2}" :md="2">
                    <el-button icon="el-icon-plus" size="small" @click="changeScale(1)"></el-button>
                </el-col>
                <el-col :lg="{span: 1, offset: 1}" :md="2">
                    <el-button icon="el-icon-minus" size="small" @click="changeScale(-1)"></el-button>
                </el-col>
                <el-col :lg="{span: 1, offset: 1}" :md="2">
                    <el-button icon="el-icon-refresh-left" size="small" @click="rotateLeft()"></el-button>
                </el-col>
                <el-col :lg="{span: 1, offset: 1}" :md="2">
                    <el-button icon="el-icon-refresh-right" size="small" @click="rotateRight()"></el-button>
                </el-col>
                <el-col :lg="{span: 2, offset: 6}" :md="2">
                    <el-button type="primary" size="small" @click="uploadImg()">提 交</el-button>
                </el-col>
            </el-row>
        </el-dialog>
    </div>
</template>

<script>
    import store from "@/store";
    import {
        VueCropper
    } from "vue-cropper";
    import {
        uploadAvatar
    } from "@/api/system/user";

    export default {
        components: {
            VueCropper
        },
        props: {
            user: {
                type: Object
            }
        },
        data() {
            return {
                // 是否显示弹出层
                open: false,
                // 弹出层标题
                title: "修改头像",
                options: {
                    img: store.getters.avatar, //裁剪图片的地址
                    autoCrop: true, // 是否默认生成截图框
                    autoCropWidth: 200, // 默认生成截图框宽度
                    autoCropHeight: 200, // 默认生成截图框高度
                    fixedBox: true // 固定截图框大小 不允许改变
                },
                previews: {}
            };
        },
        methods: {
            // 编辑头像
            editCropper() {
                this.open = true;
            },
            // 覆盖默认的上传行为
            requestUpload() {},
            // 向左旋转
            rotateLeft() {
                this.$refs.cropper.rotateLeft();
            },
            // 向右旋转
            rotateRight() {
                this.$refs.cropper.rotateRight();
            },
            // 图片缩放
            changeScale(num) {
                num = num || 1;
                this.$refs.cropper.changeScale(num);
            },
            // 上传预处理
            beforeUpload(file) {
                if (file.type.indexOf("image/") == -1) {
                    this.msgError("文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。");
                } else {
                    const reader = new FileReader();
                    reader.readAsDataURL(file);
                    reader.onload = () => {
                        this.options.img = reader.result;
                    };
                }
            },
            // 上传图片
            uploadImg() {
                this.$refs.cropper.getCropBlob(data => {
                    let formData = new FormData();
                    formData.append("avatarfile", data);
                    uploadAvatar(formData).then(response => {
                        if (response.code === 200) {
                            this.open = false;
                            let avator = process.env.VUE_APP_BASE_API + response.imgUrl;
                            this.options.img = avator;
                            this.$store.dispatch('SetAvator', avator)
                            this.msgSuccess("修改成功");
                        } else {
                            this.msgError(response.msg);
                        }
                        this.$refs.cropper.clearCrop();
                    });
                });
            },
            // 实时预览
            realTime(data) {
                this.previews = data;
            }
        }
    };

</script>
